dēng bí zi shàng liǎn
lit. to climb all over sb
fig. to take advantage of sb's weakness
蹬
dēng
to step on; to tread on
鼻
bí
nose
子
zi
noun suffix, as in 椅子[yi3 zi5] "chair"
上
shàng
(bound form) up; upper; above; previous
脸
liǎn
face